I think with cmp2 you can specify defaults at the beginning of the jbosscmp-jdbc.xml file, just specify the datasource you want to use there in each ejb jar file.
I am using the J2EE Standart and I only need to include jbosscmp-jdbc.xml in the META-INF folder???
Could I have both files in the folder META-INF of my JAR???
leaving out most of your applications, you'd have
Hope my lack of distinction between archive files and directories is not confusing.